IR-radio SED of SNR 1987A with data from Matsuura et al. (2011), Lakićević et al. (2011, 2012), Zanardo et al. (2010), and this work. Power laws are fitted to λ > 30 cm, and two different models for dust emission are plotted (cf. Lakićević et al. 2012). The upper limit of 1 mJy is plotted for any emission in the centre of the 2011 image at 3 mm in addition to that extrapolated from the synchrotron power-law.